Breast quality measurement method and system based on mutual mechanical action of breast and bra

Abstract

The invention relates to the field of breast quality detection, and provides a breast quality measurement method and system based on mutual mechanical action of breasts and brassieres, the measurement method comprises the following steps: a subject wears a detection brassiere and does repeated motion enabling the breasts of the subject to have regular longitudinal displacement, and the vibration acceleration a of the breasts relative to chest vibration is measured in the motion process; in the movement process, the shoulder strap pressure P borne by the contact part of the shoulder strap and the shoulder of the testee is measured synchronously; and according to the vibration acceleration a and the shoulder strap pressure P, calculating to obtain the breast mass of the subject. According to the breast quality measurement method, the situation that the detection result is affected by the factors such as the posture of the subject, breast sagging of the subject and age difference of the subject can be avoided, meanwhile, the situation that the subject goes to a hospital and other places for breast quality detection is avoided, the detection cost is reduced, and the practicability and convenience of breast quality detection are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of breast mass detection, and in particular to a breast mass measurement method and system based on the mutual mechanical action between a breast and a bra. Background Art

[0002] The female breast is located on the anterior chest between the sternum and the mid-axillary line, covering the superficial muscles of the anterior and lateral chest wall. Because there is no substantial anatomical structure to support the breast, it can swing from the chest wall. During running, when the runner's feet touch the ground, the vertical descent of the trunk suddenly decelerates, causing the lower part of the breast to "slap" the anterior abdomen / chest wall, which is considered to be the main cause of exercise-induced breast pain during running. At this time, women need to wear sports bras to reduce breast vibration. When a woman stands upright, the gravity of the breast generates a bending moment on her thoracic spine. The excessive load on the thoracic spine muscles and soft tissue structures caused by this bending moment is related to secondary changes in posture and impaired spinal and upper limb movement in women with large breasts. Therefore, understanding the weight of the breast is crucial to the design of sports bras, breast prosthesis design, and understanding how the breast affects the trunk load and the function of the upper trunk musculoskeletal structure.

[0003] The method for measuring breast mass in the prior art is mainly to first measure the breast volume and then multiply it by density to obtain the breast mass. The main method used for measuring breast volume is to use medical imaging technology for measurement. This method generally requires going to a hospital or other medical institution to perform, and it is expensive. Another commonly used method is three-dimensional scanning, but when scanning women with large sagging breasts, especially when the lower part of the breast is located on the female anterior abdominal wall, it will block the scanner's view of the lower part of the breast, resulting in underestimation of the breast volume. In addition, in addition to being prone to sagging due to weight, the soft tissue of the breast is also prone to deformation due to changes in posture, resulting in differences in breast volume measurement results. The measurement of breast density is usually based on the percentage composition of fibroglandular and fibrofatty tissue in the breast and the density calculation of these tissues. When measuring breast density, the percentage of fibroglandular tissue in the breast relative to fibrofatty tissue varies with age, race, weight, hormonal status, etc., and these percentage values ​​also vary with the method used to measure tissue composition. These problems can lead to inaccurate density estimates. And the method of calculating breast mass by measuring breast volume and density is expensive, and has low practicality and convenience. Summary of the invention

[0004] To this end, the present invention solves the problems of high price, low practicality and low convenience in the prior art of breast mass measurement, and provides a breast mass measurement method and system based on the mechanical interaction between the breast and the bra, which significantly improves the practicality and convenience of breast mass detection.

[0005] In a first aspect, in order to solve the above technical problems, the present invention provides a breast mass measurement method based on the mechanical interaction between a breast and a bra, comprising:

[0006] The subject wears the detection bra and performs repeated movements to cause the breast to have regular longitudinal displacement, and the vibration acceleration a of the breast relative to the chest cavity is measured during the movement; wherein the detection bra includes shoulder straps;

[0007] and, synchronously measuring the shoulder strap pressure P exerted on the contact portion between the shoulder strap and the subject's shoulder during the exercise;

[0008] The breast mass of the subject is obtained by calculation according to the vibration acceleration a and the shoulder strap pressure P.

[0009] In one embodiment of the present invention, calculating the breast mass of the subject includes calculating the breast mass of the subject according to the following formula:

[0010]

[0011] Wherein, m is the mass of the breast, P is the shoulder strap pressure, A is the equivalent horizontal surface area of ​​the shoulder strap in contact with the subject's shoulder, g is the gravitational acceleration, and a is the vibration acceleration.

[0012] In one embodiment of the present invention, the measuring of the vibration acceleration a of the breast relative to the chest cavity comprises:

[0013] Establish the global coordinate system O-XYZ in space;

[0014] and determining three points SN, LA, and RA on the front side of the subject's trunk, wherein the relative positions of the three points remain fixed during the subject's repeated movements, and establishing a dynamic local coordinate system o-uvn with the three points SN, LA, and RA as reference planes;

[0015] During the repeated movement, obtaining the coordinate change of a point BD of any unilateral breast in the global coordinate system O-XYZ;

[0016] The coordinates of the BD point in the global coordinate system O-XYZ are converted into coordinates in the dynamic local coordinate system o-uvn, and the longitudinal displacement of the breast relative to the chest cavity corresponding to the v coordinate change of the BD point in the dynamic local coordinate system o-uvn is obtained. The vibration acceleration a of the breast relative to the chest cavity is obtained by taking the second differential of the longitudinal displacement.

[0017] In one embodiment of the present invention, during the repeated motion, a vibration acceleration curve of the BD point is obtained; and during the repeated motion, a shoulder strap pressure fluctuation curve is obtained; the vibration acceleration curve is synchronized with the shoulder strap pressure fluctuation curve; and the vibration acceleration corresponding to the maximum shoulder strap pressure value in a gait is taken as the vibration acceleration of the breast relative to the chest cavity.

[0018] In one embodiment of the present invention, the BD point is the centroid of the breast.

[0019] In one embodiment of the present invention, the dynamic local coordinate system o-uvn includes the rigid body motion of the torso in six degrees of freedom.

[0020] In one embodiment of the present invention, the detection bra is configured to enable the gravity load of the breast and the additional load generated by the movement to be completely transferred to the shoulders of the subject, and the detection bra further comprises:

[0021] A bra side ratio, wherein the bra side ratio does not bear the weight of the breast;

[0022] A cup, wherein the cup is configured as a non-padded cup so that the surface displacement of the cup is consistent with the displacement of the breast covered by the cup;

[0023] The shoulder straps are configured as non-elastic shoulder straps so that the shoulder straps do not undergo length expansion or contraction deformation during trunk movement.

[0024] In one embodiment of the present invention, the shoulder strap pressure P is measured based on a clothing pressure measurement system.

[0025] In one embodiment of the present invention, the measurement range of the clothing pressure measurement system is not higher than 24 kPa, the detection accuracy value is not higher than 200 Pa, and the sampling frequency is greater than or equal to 100 Hz.

[0026] In a second aspect, in order to solve the above technical problems, the present invention further provides a breast mass measurement system based on the mechanical interaction between a breast and a bra, comprising:

[0027] A test bra, comprising shoulder straps, wherein the subject wears the test bra and performs repeated movements to cause regular longitudinal displacement of the breasts;

[0028] A vibration acceleration measurement module, which is used to measure the vibration acceleration a of the breast relative to the chest during exercise;

[0029] A shoulder strap pressure measurement module, which is used to synchronously measure the shoulder strap pressure P exerted on the contact portion between the shoulder strap and the subject's shoulder during exercise;

[0030] A breast mass measurement module is configured to calculate the breast mass of the subject according to the vibration acceleration a and the shoulder strap pressure P.

[0031] In one embodiment of the present invention, the breast mass measurement module comprises calculating the breast mass of the subject based on the following formula:

[0032]

[0033] Wherein, m is the mass of the breast, P is the shoulder strap pressure, A is the equivalent horizontal surface area of ​​the shoulder strap in contact with the subject's shoulder, g is the gravitational acceleration, and a is the vibration acceleration.

[0034] The above technical solution of the present invention has the following beneficial effects compared with the prior art:

[0035] In the breast mass measurement method and system based on the mechanical interaction between the breast and the bra of the present invention, the subject wears a detection bra and performs repeated movements to cause the breast to have regular longitudinal displacements. During the movement, the shoulder strap pressure P of the subject and the vibration acceleration a of the breast relative to the chest cavity are synchronously measured, and the breast mass of the subject is calculated by the vibration acceleration a and the shoulder strap pressure P. The breast mass measurement method of the present invention can avoid the influence of factors such as the posture of the subject, sagging of the breast of the subject, age differences of the subject, etc. on the detection result, and also avoids going to hospitals and other places for breast mass detection, thereby reducing the detection cost and significantly improving the practicality and convenience of breast mass detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein:

[0037] Figure 1 It is a flow chart of a method for measuring breast mass based on the mechanical interaction between breast and bra in a preferred embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of a bra detection device in a preferred embodiment of the present invention;

[0039] Figure 3 It is a schematic diagram of the concentrated pressure on the horizontal plane of the top of the shoulder in contact with the shoulder strap, which is equivalent to the transfer of the breast gravity load and the additional load generated by the movement to the shoulders of the test subject in the breast quality detection method based on the mechanical interaction between the breast and the bra in the preferred embodiment of the present invention;

[0040] Figure 4 Schematic diagram of the global coordinate system O-XYZ and the dynamic local coordinate system o-uvn established in the preferred embodiment of the present invention;

[0041] Figure 5 This is a module diagram of a breast mass measurement system based on the mechanical interaction between a breast and a bra in a preferred embodiment of the present invention;

[0042] Figure 6 It is a vibration acceleration curve and shoulder strap pressure fluctuation curve in one gait cycle when the subject does repetitive movements;

[0043] Figure 7 Figure 2 shows the mean and standard deviation of breast mass obtained from 9 subjects during 5 gaits.

[0044] Description of the accompanying drawings in the specification: 100, vibration acceleration measurement module; 200, shoulder strap pressure measurement module; 300, breast mass measurement module. DETAILED DESCRIPTION

[0045] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0046] Embodiment 1

[0047] The embodiment of the present invention discloses a breast mass measurement method based on the mechanical interaction between the breast and the bra. The measurement method requires the use of a detection bra and a clothing pressure measurement system, such as Figure 2 As shown, the detection bra includes a bra side ratio, a cup and a shoulder strap, wherein the bra side ratio is narrow, so that the weight of the breast can be completely transferred to the shoulders of the test subject, that is, the bra side ratio does not bear the weight of the breast; the cup is a non-padded cup, so that the surface displacement of the cup is consistent with the displacement of the breast covered by it, and at the same time, the equivalent effect of the gravity load of the breast and the additional load on the shoulder strap pressure affected by the pad is avoided, resulting in the influence of the breast quality detection result, thereby improving the reliability of the breast quality detection result; the shoulder strap is a non-elastic shoulder strap, so that the shoulder strap has no length expansion and contraction deformation during the movement of the trunk, so that the additional load generated by the breast vibration changes synchronously with the shoulder strap pressure.

[0048] The clothing pressure measurement system is used to measure the shoulder strap pressure P. The clothing pressure measurement system can quickly and accurately measure the clothing pressure objectively, and the setting of its detection index can also improve the detection accuracy of the clothing pressure measurement system, so that it meets the requirements of shoulder strap pressure value measurement. Specifically, since the shoulder strap pressure after the subject wears the detection bra generally does not exceed 10kPa, the embodiment of the present invention requires that the range of the clothing pressure measurement system is not higher than 24kPa, the detection accuracy value is not higher than 200Pa, and the sampling frequency is greater than or equal to 100Hz; for example, in one embodiment, the range of the clothing pressure measurement system is 24kPa, and the detection accuracy is 200Pa; thereby ensuring that the clothing pressure measurement system has high measurement accuracy; the sampling frequency is 100Hz, and the sampling frequency of 100Hz can ensure that dynamic pressure changes are captured in time during exercise and the breast mass is accurately calculated.

[0049] Specifically, refer to Figure 1 As shown, the breast mass measurement method includes the following steps:

[0050] First, the subject wears the test bra and performs repeated exercises to cause regular longitudinal displacement of the breast, preferably running at a constant speed;

[0051] During the exercise, the vibration acceleration a of the subject's breast relative to the chest cavity is measured; wherein the vibration acceleration a multiplied by the subject's breast mass m is the additional load generated by the subject's breast relative to the chest cavity;

[0052] Reference Figure 3 As shown, the shoulder strap transfers the subject's breast gravity load and the additional load generated by the relative chest vibration to the subject's shoulder, which is equivalent to a concentrated pressure F on the shoulder horizontal plane in contact with the shoulder strap, and the concentrated pressure F generates a shoulder strap pressure on the equivalent horizontal plane; and the shoulder strap pressure P is synchronously measured during the subject's movement; the shoulder strap pressure P is the sum of the gravity load and the additional load divided by the area of ​​the equivalent horizontal plane, the gravity load is the gravitational acceleration of the breast multiplied by the breast mass, and the additional load is the vibration acceleration multiplied by the breast mass;

[0053] The breast mass of the subject is calculated using the shoulder strap pressure value and the vibration acceleration.

[0054] By measuring the breast mass of the subject using the above method, it is possible to avoid the test results being affected by factors such as the subject's posture, sagging breasts, and age differences of the subjects. At the same time, this method also avoids going to hospitals and other places for breast quality testing, reduces testing costs, and significantly improves the practicality and convenience of breast quality testing.

[0055] Furthermore, if Figure 3As shown, A is the equivalent horizontal surface area of ​​the contact portion between the shoulder strap and the subject's shoulder, and F is the concentrated pressure;

[0056] The calculation formula of the concentrated pressure F is:

[0057] F=mg+ma

[0058] Among them, mg is the gravitational load of the subject's breast, and ma is the additional load caused by the vibration of the subject's breast relative to her chest cavity.

[0059] Specifically, the breast mass of the subject is calculated according to the following formula:

[0060]

[0061] Wherein, m is the mass of the breast, P is the shoulder strap pressure, A is the equivalent horizontal surface area of ​​the shoulder strap in contact with the subject's shoulder, g is the gravitational acceleration, and a is the vibration acceleration.

[0062] Specifically, measuring the vibration acceleration a of the subject's breast relative to the chest cavity includes:

[0063] Establish a global coordinate system O-XYZ in space; the global coordinate system O-XYZ takes the plane parallel to the ground as the XY axis and the direction of the Z axis perpendicular to the ground;

[0064] Reference Figure 4 As shown, three points SN, LA and RA are determined on the front side of the subject's trunk, wherein SN is the suprasternal notch point, LA and RA are the left and right anterior and lower points of the tenth rib, respectively, and LA and RA are horizontally symmetrical points; a reference plane is established with the connecting triangle of SN, LA and RA, and a dynamic local coordinate system o-uvn is established through the reference plane; the above method of selecting SN, LA and RA can ensure that the relative positions of the three points SN, LA and RA remain fixed during the subject's repeated movements.

[0065] A dynamic local coordinate system o-uvn is established, wherein the dynamic local coordinate system o-uvn takes point SN as the coordinate origin o, the line parallel to point LA and point RA as the u-axis direction, the normal direction of the reference plane as the v-axis direction, and the normal direction of the plane formed by the u-axis and the v-axis as the n-axis direction; and the dynamic local coordinate system o-uvn includes the rigid body motion of the torso with six degrees of freedom, and the six degrees of freedom include three translational degrees of freedom and three rotational degrees of freedom.

[0066] A BD point is determined on any unilateral breast of the subject, wherein the BD point is preferably the centroid position of the unilateral breast, for example, a point 2 cm below the breast is selected; at this time, the movement of the BD point represents the centroid movement of the unilateral breast of the subject; by selecting the centroid position of the unilateral breast, the maximum amplitude movement trajectory of the breast when the subject moves can be accurately captured, thereby improving the accuracy of breast quality detection.

[0067] Using a motion capture system to capture the coordinate changes of the BD point in the global coordinate system O-XYZ along with the repeated motion;

[0068] Since the coordinate change of the BD point in the global coordinate system O-XYZ includes the rigid displacement of the chest cavity, the vibration displacement of the breast relative to the chest cavity cannot be intuitively reflected in the global coordinate system. In a preferred embodiment of the present invention, the coordinate of the BD point in the global coordinate system O-XYZ is transformed into the coordinate in the dynamic local coordinate system o-uvn, thereby accurately and intuitively reflecting the relative position change of the breast and the chest cavity of the subject during the movement, so as to obtain the vibration displacement of the BD point relative to the chest cavity;

[0069] The change of the v coordinate of the point BD in the dynamic local coordinate system o-uvn corresponds to the longitudinal displacement of the breast relative to the chest cavity, and the vibration acceleration a of the breast relative to the chest cavity is obtained by taking the second derivative of the longitudinal displacement.

[0070] Furthermore, in order to improve the measurement accuracy and precision, the vibration acceleration a and the shoulder strap pressure P are continuously measured during the repeated movement. Figure 6 As shown, the vibration acceleration of the BD point is continuously measured and a vibration acceleration curve is drawn, and the shoulder strap pressure is continuously measured and a shoulder strap pressure fluctuation curve is drawn, and the vibration acceleration curve and the shoulder strap pressure fluctuation curve are synchronized in time sequence; the vibration acceleration corresponding to the maximum shoulder strap pressure value in a gait is taken as the vibration acceleration of the breast relative to the chest cavity. Specifically, as Figure 6 As shown in the figure, when the left foot steps forward in a gait and before the trunk rises to the highest point, the downward acceleration of the left breast relative to the chest cavity reaches the maximum, causing the left shoulder strap pressure to reach the maximum. At this time, most of the soft tissues of the left breast from the surface to the deep layer participate in the vibration relative to the chest cavity. The peak vibration acceleration a and its corresponding peak shoulder strap pressure P at this point are taken, and the calculated breast mass m is the largest, which is also the mass of the breast soft tissue actually participating in the vibration. For breast kinematics research and sports bra design, this breast mass is more accurate, thereby further improving the measurement accuracy of breast mass.

[0071] In summary, in the breast mass measurement method based on the mechanical interaction between the breast and the bra described in the present invention, the subject only needs to wear a detection bra and do repeated movements that can cause the breast to be regularly displaced longitudinally, and during the repeated movements, the shoulder strap pressure P of the subject and the vibration acceleration a of the breast relative to the chest cavity are synchronously measured, and the breast mass of the subject can be calculated by the vibration acceleration a and the shoulder pressure value P; this method can avoid the influence of factors such as the posture of the subject, the sagging of the breast of the subject, and the age difference of the subject on the detection result, and at the same time, this method also avoids going to hospitals and other places for breast mass detection, reduces the detection cost, and significantly improves the practicality and convenience of breast quality detection.

[0072] Embodiment 2

[0073] Reference Figure 5 As shown, the present invention also discloses a breast mass measurement system based on the mechanical interaction between a breast and a bra, comprising:

[0074] A test bra is worn by a subject, and the subject performs repeated movements that cause the subject's breasts to have regular longitudinal displacements; wherein, reference is made to Figure 2 As shown, the detection bra includes shoulder straps, bra side ratios and cups; preferably, the bra side ratio of the detection bra selected in the embodiment of the present invention is narrow, so that the weight of the breast can be completely transferred to the shoulders of the test subject; the cup is set as a non-padded cup, so that the displacement of the bra cup surface is consistent with the displacement of the breast covered by it, and at the same time, the equivalent effect of the gravity load of the breast and the additional load on the shoulder strap pressure affected by the pad is avoided, resulting in the influence of the breast quality detection result, thereby improving the reliability of the breast quality detection result; the shoulder strap is set as a non-elastic shoulder strap, so that there is no expansion and contraction change of the shoulder strap length during body movement, so that the additional load generated by the breast vibration changes synchronously with the shoulder strap pressure;

[0075] A vibration acceleration measurement module 100, which is used to measure the vibration acceleration a of the breast relative to the chest during exercise;

[0076] A shoulder strap pressure measurement module 200, which is used to synchronously measure the shoulder strap pressure P exerted on the contact portion between the shoulder strap and the subject's shoulder during exercise;

[0077] The breast mass measurement module 300 is configured to calculate the breast mass of the subject according to the vibration acceleration a and the shoulder strap pressure P.

[0078] Specifically, the breast mass measurement module includes calculating the breast mass of the subject based on the following formula:

[0079]

[0080] Where m is the mass of the breast, P is the shoulder strap pressure, A is the equivalent horizontal surface area of ​​the shoulder strap in contact with the subject's shoulder, g is the gravitational acceleration, and a is the vibration acceleration.

[0081] Test Example 1

[0082] Figure 2 The test bra has a narrow underband and side ratio, no padding in the cup, no elastic shoulder straps, and a shoulder strap width of 2 cm; Figure 6 The figure is the correspondence between the shoulder strap pressure value and the breast vibration acceleration curve in one gait cycle of one of the subjects; Figure 7 Shown are the means and standard deviations of breast mass obtained from five stable gaits for nine subjects.

[0083] The test steps are as follows: 9 young women were selected as subjects, with lower chest circumferences between 70 and 80 cm, three of whom had cup sizes of A, three had cup sizes of B, and three had cup sizes of C. Each subject was asked to wear Figure 5 The test bra was worn on a treadmill at a speed of 7 km / h for 3 minutes, and the pressure of the left shoulder strap of each subject was measured using the Pliance pressure measurement system. Figure 2 As shown, the motion trajectory of three points on the trunk was synchronously obtained by the Vicon motion capture system: the suprasternal notch point, the anterior and inferior points of the left and right tenth ribs, and the left submammary point. The vibration acceleration of the breast of each subject was obtained by obtaining the vibration longitudinal displacement of the submammary point relative to the chest cavity. Five stable gaits were selected, and the shoulder strap pressure values ​​and vibration accelerations obtained were used to calculate the average breast mass measured in each of the five stable gaits of each subject.

[0084] Specifically, refer to Figure 6 It can be seen that when the shoulder strap pressure reaches the maximum value, the downward vibration acceleration of the breast also reaches the maximum value; the shoulder strap pressure value at this time is 8.1kPa and the vibration acceleration is 3.83m / s 2 The equivalent horizontal surface area of ​​the shoulder strap in contact with the subject's shoulder is 4 cm 2 (2cm*2cm), the calculated breast mass is 237.7g.

[0085] Reference Figure 7 As shown, according to the data predicted in the existing literature, the mass range of the breasts of 32A-32F (32 corresponds to a lower chest circumference of 70 cm) is 110-700g. The mass obtained by this method falls completely within the range predicted in the literature, verifying the reliability of the breast mass detection method of the present invention.

[0086] The breast mass measurement method and system based on the mechanical interaction between the breast and the bra of the present invention adopts a method of having a subject wear a detection bra and perform repeated movements that can cause the breast to be regularly displaced longitudinally, synchronously measuring the shoulder strap pressure of the subject and the vibration acceleration of the breast relative to the chest cavity during the movement, and calculating the breast mass of the subject through the vibration acceleration and shoulder pressure values; this method can avoid the influence of factors such as the posture of the subject, sagging of the breast of the subject, age difference of the subject, etc. on the detection result of the breast, and at the same time, this method also avoids going to hospitals and other places for breast mass detection, reduces the detection cost, and significantly improves the practicality and convenience of breast mass detection.

[0087] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0088] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0089] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0090] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0091] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A method for measuring breast mass based on the mechanical interaction between breast and bra, characterized in that: The steps include: The subject wears the detection bra and performs repeated movements to cause the breast to have regular longitudinal displacement, and the vibration acceleration a of the breast relative to the chest cavity is measured during the movement; wherein the detection bra includes shoulder straps; and, synchronously measuring the shoulder strap pressure P exerted on the contact portion between the shoulder strap and the subject's shoulder during the exercise; The breast mass of the subject is obtained by calculation according to the vibration acceleration a and the shoulder strap pressure P.

2. The breast mass measurement method based on the mechanical interaction between breast and bra according to claim 1, characterized in that: Calculating the breast mass of the subject includes calculating the breast mass of the subject according to the following formula: Wherein, m is the mass of the breast, P is the shoulder strap pressure, A is the equivalent horizontal surface area of ​​the shoulder strap in contact with the subject's shoulder, g is the gravitational acceleration, and a is the vibration acceleration.

3. The breast mass measurement method based on the mechanical interaction between breast and bra according to claim 1 or 2, characterized in that: The vibration acceleration a for measuring the vibration of the breast relative to the chest cavity comprises: Establish the global coordinate system O-XYZ in space; and determining three points SN, LA, and RA on the front side of the subject's trunk, wherein the relative positions of the three points remain fixed during the subject's repeated movements; and establishing a dynamic local coordinate system o-uvn using the three points SN, LA, and RA as reference planes; During the repeated movement, obtaining the coordinate change of a point BD of any unilateral breast in the global coordinate system O-XYZ; The coordinates of the BD point in the global coordinate system O-XYZ are converted into coordinates in the dynamic local coordinate system o-uvn, and the v coordinate change of the BD point in the dynamic local coordinate system o-uvn is obtained as the longitudinal displacement of the breast relative to the chest cavity. The vibration acceleration a of the breast relative to the chest cavity is obtained by taking the second derivative of the longitudinal displacement.

4. The breast mass measurement method based on the mechanical interaction between breast and bra according to claim 3, characterized in that: Also includes, During the repeated motion, obtaining a vibration acceleration curve of the BD point; and, during the repeated movement, obtaining the shoulder strap pressure fluctuation curve; The vibration acceleration curve is synchronized with the shoulder strap pressure fluctuation curve; and the vibration acceleration corresponding to the maximum shoulder strap pressure value in a gait is taken as the vibration acceleration of the breast relative to the chest cavity.

5. The breast mass measurement method based on the mechanical interaction between breast and bra according to claim 3, characterized in that: The BD point is the centroid of the breast.

6. The breast mass measurement method based on the mechanical interaction between breast and bra according to claim 3, characterized in that: The dynamic local coordinate system o-uvn includes the rigid body motion of the torso with six degrees of freedom.

7. The breast mass measurement method based on the mechanical interaction between breast and bra according to claim 1, characterized in that: The detection bra is configured to enable the gravity load of the breast and the additional load generated by movement to be fully transferred to the shoulders of the subject; The detection bra also includes: A bra side ratio, wherein the bra side ratio does not bear the weight of the breast; A cup, wherein the cup is configured as a non-padded cup so that the surface displacement of the cup is consistent with the displacement of the breast covered by the cup; The shoulder straps are configured as non-elastic shoulder straps so that the shoulder straps do not undergo length expansion or contraction deformation during trunk movement.

8. The breast mass measurement method based on the mechanical interaction between breast and bra according to claim 1, characterized in that: The shoulder strap pressure P is measured based on a clothing pressure measurement system; the measurement range of the clothing pressure measurement system is not higher than 24 kPa, the detection accuracy value is not higher than 200 Pa, and the sampling frequency is greater than or equal to 100 Hz.

9. A breast mass measurement system based on the mechanical interaction between breast and bra, characterized in that: include: A test bra, comprising shoulder straps, wherein the subject wears the test bra and performs repeated movements to cause regular longitudinal displacement of the breasts; A vibration acceleration measurement module, which is used to measure the vibration acceleration a of the breast relative to the chest during exercise; A shoulder strap pressure measurement module, which is used to synchronously measure the shoulder strap pressure P exerted on the contact portion between the shoulder strap and the subject's shoulder during exercise; A breast mass measurement module is configured to calculate the breast mass of the subject according to the vibration acceleration a and the shoulder strap pressure P.

10. The breast mass measurement system based on the mechanical interaction between breast and bra according to claim 9, characterized in that: The breast mass measurement module includes calculating the breast mass of the subject based on the following formula: Wherein, m is the mass of the breast, P is the shoulder strap pressure, A is the equivalent horizontal surface area of ​​the shoulder strap in contact with the subject's shoulder, g is the gravitational acceleration, and a is the vibration acceleration.

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